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A Lithium Air Electrochemical Cell With Catalyzation Composition From Dry Cell Bobbins, And Preparation Method Thereof

Abstract: A lithium-air electrochemical cell with catalyzation composition from dry cell bobbins, and preparation method thereof [0038] The present invention provides a lithium-air electrochemical cell with catalyzation composition from dry cell bobbins, and preparation method thereof. The electrochemical cell (100) comprises an air-breathing electrode (101) as a cathode, a 16-millimetre diameter lithium chip (102) as an anode, a Whatman glass microfiber filter paper (103) as a separator and an electrolytic solution (104) of 1 molarity lithium trifluoromethane sulphonate in tetraethylene glycol dimethyl as a conducting solution. Further, the air-breathing electrode (101) comprises dry cell bobbin material at a concentration of about 80%, carbon P super black at a concentration of about 15% and polyvinylidene fluoride at a concentration of about 5%. The dry cell bobbin material is derived from the bobbin components of depleted zinc-carbon dry cells. (Figure 1)

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Patent Information

Application #
Filing Date
09 July 2021
Publication Number
02/2023
Publication Type
INA
Invention Field
CHEMICAL
Status
Email
bindu@origiin.com
Parent Application
Patent Number
Legal Status
Grant Date
2024-10-23
Renewal Date

Applicants

Pondicherry University
Pondicherry University, Kalapet, Puducherry- 605 014, India

Inventors

1. Dr. Perumal Elumalai
Department of Green Energy Technology, Pondicherry University, Kalapet, Puducherry- 605 014, India
2. Mr. Krishna Tejus Ethikkal Murali
Department of Green Energy Technology, Pondicherry University, Kalapet, Puducherry- 605 014, India
3. Mrs. Athika Mattath
Department of Green Energy Technology, Pondicherry University, Kalapet, Puducherry- 605 014, India
4. Ms. Anoja Tony
Department of Green Energy Technology, Pondicherry University, Kalapet, Puducherry- 605 014, India

Specification

Claims:Claims We claim: A lithium-air electrochemical cell with catalyzation composition from dry cell bobbins, the electrochemical cell (100) comprising: an air-breathing electrode (101) as a cathode, a 16-millimetre diameter lithium chip (102) as an anode; a Whatman glass microfiber filter paper (103) as a separator; an electrolytic solution (104) of 1 molarity lithium trifluoromethane sulphonate dissolved in tetraethylene glycol dimethyl. Wherein the air-breathing electrode (101) comprises: dry cell bobbin material at a concentration of between 75 and 85%; carbon P super black at a concentration of between 10% and 20%; polyvinylidene fluoride at a concentration of between 5% and 15%. The air-breathing electrode (101) as claimed in claim 1, wherein dry cell bobbin material is derived from the bobbin components of depleted zinc-carbon dry cells. A method to prepare a composition to catalyze a lithium-air electrochemical cell (100), the method (200) comprising: extracting a dry cell bobbin from a depleted zinc-carbon battery by manual extraction of the bobbin; washing the extracted dry cell bobbin with deionized water to eliminate any impurities present on the dry cell bobbin, thus forming a dry cell bobbin slurry; drying the dry cell bobbin slurry at a temperature of 50°C to form a clean dry cell bobbin sample; crushing the dry cell bobbin sample until a dry cell bobbin material is obtained; mixing the dry cell bobbin material with carbon P super black and polyvinylidene fluoride in a ratio of between 75% and 85% of dry cell bobbin material, between 10% and 20% of carbon P super black and between 5% and 15% of polyvinylidene fluoride by weight to form a bobbin sample powder; mixing the bobbin sample powder with 4 to 5 drops of N-methyl-2-pyrrolidone solvent to form a catalyzation composition to catalyze a lithium-air electrochemical cell (100). A method to prepare a lithium-air electrochemical cell (100) comprising a catalyzation composition, the method (300) comprising: coating the catalyzation composition on a carbon cloth; drying the above-obtained carbon cloth in a hot oven at between 75° Celsius and 85° Celsius for a period of 12 hours to obtain a dried carbon cloth coated with the catalyzation composition; cutting a 16-millimetre diameter circle from the dried carbon cloth and using the cut circle as an air-breathing electrode (101); assembling a lithium-air electrochemical cell (100), the electrochemical cell (100) further comprising: the air-breathing electrode (101) as a cathode; a 16-millimetre diameter lithium chip (102) as an anode; a Whatman glass microfiber filter paper (103) as a separator; an electrolytic solution (104) of 1 molarity lithium trifluoromethane sulphonate in tetraethylene glycol dimethyl as a conducting solution. , Description:PREAMBLE TO THE DESCRIPTION: The following specification particularly describes the invention and the manner in which it is to be performed: DESCRIPTION OF THE INVENTION Technical field of the invention The present invention discloses a lithium-air electrochemical cell with catalyzation composition from dry cell bobbins,. The present invention in particular relates to an electrochemical cell catalyzation composition from the bobbin component of depleted dry cells. The present invention further relates to a method of preparation of the catalyzation composition. Background of the invention In today’s age, electricity and devices that utilize electricity have become indispensable items in everyday life. A large percentage of such devices operate on stored electrical energy in the form of chemical energy within electrochemical cells such as batteries and cells. Electrochemical cells convert chemical energy stored within the electrochemical cell to electrical energy by electrochemical processes that liberate or consume electrons. Due to the ever-increasing demand of devices that consume electricity, electrochemical cells of higher performance are being considered for usage. These electrochemical cells tend to discharge a significantly high amounts of energy during chemical reactions and are thus termed high energy density electrochemical cells. Amongst high energy density electrochemical cells, lithium-air cells possess significantly high theoretical energy density, where energy density pertains to how much potential difference is produced by a device. However, despite having a high theoretical energy density, present-day lithium-air electrochemical cells are not suitable for use due to technical reasons. The driving reactions that discharge electrons and thereby produce energy in lithium-air cells do not occur at a quick enough rate to develop the theoretical energy density possible. These reactions include the oxygen reduction reaction and oxygen evolution reaction, both of which occur at a slow rate in conventional lithium-air electrochemical cells, rendering them unfit for daily use. The patent application KR101239966B1 titled “Positive Electrode for lithium air battery, method of preparing the same, and lithium air battery employing the same” discloses a negative electrode capable of storing and releasing lithium ions; Electrolyte; And a positive electrode which uses oxygen as a positive electrode active material; In addition, the positive electrode includes a carbon-based material doped with a non-metallic element discloses a lithium air battery with improved energy efficiency. The patent application KR101602337B1 titled “Air electrode for lithium air-battery and method of making the same” discloses an air electrode for a lithium air battery, wherein the air electrode comprises an inclusion catalyst on the current collector. The present invention also provides a method of manufacturing an air electrode for a lithium air battery and a lithium air battery. The air electrode of the present invention can remarkably improve the performance of the lithium air battery. The patent application US8313721B2 titled “Lithium-oxygen (AIR) electrochemical cells and batteries” discloses a lithium-oxygen or lithium-air electrochemical cell comprising a negative electrode, an electrolyte, and a porous activated positive electrode comprising lithium-rich electrocatalytic materials suitable for use in lithium-oxygen (air) cells and batteries. The activated positive electrode is produced by activating a precursor electrode formed from a material comprising one or more metal oxide compounds of general formula xLi2O.yMOz, in which 0

Documents

Application Documents

# Name Date
1 202141030895-STATEMENT OF UNDERTAKING (FORM 3) [09-07-2021(online)].pdf 2021-07-09
2 202141030895-PROOF OF RIGHT [09-07-2021(online)].pdf 2021-07-09
3 202141030895-POWER OF AUTHORITY [09-07-2021(online)].pdf 2021-07-09
4 202141030895-FORM 1 [09-07-2021(online)].pdf 2021-07-09
5 202141030895-DRAWINGS [09-07-2021(online)].pdf 2021-07-09
6 202141030895-DECLARATION OF INVENTORSHIP (FORM 5) [09-07-2021(online)].pdf 2021-07-09
7 202141030895-COMPLETE SPECIFICATION [09-07-2021(online)].pdf 2021-07-09
8 202141030895-FORM 18 [07-10-2023(online)].pdf 2023-10-07
9 202141030895-FORM-26 [10-10-2023(online)].pdf 2023-10-10
10 202141030895-FORM 18A [12-02-2024(online)].pdf 2024-02-12
11 202141030895-EVIDENCE OF ELIGIBILTY RULE 24C1f [12-02-2024(online)].pdf 2024-02-12
12 202141030895-FER.pdf 2024-03-20
13 202141030895-FORM-8 [27-04-2024(online)].pdf 2024-04-27
14 202141030895-OTHERS [18-09-2024(online)].pdf 2024-09-18
15 202141030895-FORM 13 [18-09-2024(online)].pdf 2024-09-18
16 202141030895-FER_SER_REPLY [18-09-2024(online)].pdf 2024-09-18
17 202141030895-COMPLETE SPECIFICATION [18-09-2024(online)].pdf 2024-09-18
18 202141030895-CLAIMS [18-09-2024(online)].pdf 2024-09-18
19 202141030895-Response to office action [04-10-2024(online)].pdf 2024-10-04
20 202141030895-Annexure [04-10-2024(online)].pdf 2024-10-04
21 202141030895-PatentCertificate23-10-2024.pdf 2024-10-23
22 202141030895-IntimationOfGrant23-10-2024.pdf 2024-10-23
23 202141030895-OTHERS [22-01-2025(online)].pdf 2025-01-22
24 202141030895-EDUCATIONAL INSTITUTION(S) [22-01-2025(online)].pdf 2025-01-22

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1 searchstrategy202141030895E_19-03-2024.pdf

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